DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 211

• Manufacturer Part Number: DF2148BTE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BTE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148BTE20; HD64F2148BTE20

7.5
The DTC stores register information in on-chip RAM. When activated, the DTC reads register
information in on-chip RAM and transfers data. After the data transfer, the DTC writes updated
register information back to on-chip RAM. The pre-storage of register information in memory
makes it possible to transfer data over any required number of channels. The transfer mode can be
specified as normal, repeat, or block transfer mode. Setting the CHNE bit in MRB to 1 makes it
possible to perform a number of transfers with a single activation source (chain transfer).
The 24-bit SAR designates the DTC transfer source address, and the 24-bit DAR designates the
transfer destination address. After each transfer, SAR and DAR are independently incremented,
decremented, or left fixed depending on its register information.
Operation
Read register information
Write register information
Clear an activation flag
Transfer counter = 0
Figure 7.4 DTC Operation Flowchart
Read DTC vector
Data transfer
or DISEL = 1
CHNE = 1
No
No
Start
End
Yes
Yes
Next transfer
Interrupt exception
Section 7 Data Transfer Controller (DTC)
Rev. 3.00 Mar 21, 2006 page 155 of 788
Clear DTCER
handling
REJ09B0300-0300